Roof vents undoubtedly play a crucial role in cooling your home, but it's indirect. While they don't actively blow cold air like an air conditioner, they work to regulate the temperature in your attic, which ultimately impacts the overall comfort level of your living space.
Disadvantages of Turbine Roof Vents
Reliant on Winds: Turbine roof vents harness the power of wind to expel hot air from the attic. This reliance on wind is both their strength and weakness. On calm days with little to no wind, these vents may struggle to spin, reducing their efficiency.
Intake: An intake vent works by bringing cooler air into the roof. Much like how opening windows on opposite ends of sides of a house lets air blow through from one end to another, cool air sucked into the intake displaces hot air by pushing it out of the vents. Examples of intake vents include soffit and gable vents.
During warmer months, roof vents play a critical role in expelling hot, stale air from your attic space. This helps to lower the temperature in your home's upper levels, reducing the strain on your air conditioning system and promoting energy efficiency.
Beyond the energy savings, roof ventilation can also prevent many issues, including mold growth, ice dams, and structural damage due to moisture in your attic.
Roof vents undoubtedly play a crucial role in cooling your home, but it's indirect. While they don't actively blow cold air like an air conditioner, they work to regulate the temperature in your attic, which ultimately impacts the overall comfort level of your living space.
For a home with 2000 square feet of attic floor space, you'll first divide 2000 by 300 (2000 ÷ 300 = 6.66). You need 6.66 square feet of attic ventilation. Since you want a balanced system, you divide by 2 so that half of the ventilation is intake and half is exhaust.
If you're installing tile or slate vents, it's important to install them on both the front and rear sides of your roof to allow for complete air circulation. If your home is susceptible to condensation, we'd recommend installing tile or slate vents at varying heights for more thorough air circulation.
Both types of vents are effective tools for ventilating your home, but ridge vents are more common nowadays. Box vents are more prone to leaking, letting critters into your attic and rust. The important rule to keep in mind is to install only one type of roof vent.
Your roof vents should be split evenly with half dedicated to air intake and half dedicated for air exhaust. That means that a 2,400-square-foot home with a roof that has a moisture barrier would need 8 square feet of roof vent.
Understanding Roof Vent Leaks
But when it rains heavily, these vents can start leaking. This often happens if they aren't installed correctly, or if the flashing or vent pipe boot around them is damaged.
Ridge vents are one of the most popular types of roof ventilation. They provide a continuous flow of air along the entire length of your roof's ridge line. Ridge vents can be installed on both shingled and metal roofs, making them an ideal choice for a variety of homes.
As heated air naturally rises, it collects in the attic, a space that can significantly heat up due to direct sunlight on the roof. Roof vents, including the effective ridge vents, allow this hot air to exit, while cooler air is drawn in through intake vents, usually positioned at the lower parts of the roof.
It is absolutely possible the ventilation system on your roof is excessive. Maybe your home is older and prior ventilation was installed by a homeowner, or incorrect vent sizes were used in an older roof layout. Too much ventilation can negatively influence the attic's and home's insulation as well.
Excessive Heat in the Attic
With poor ventilation in house, the hot air concentrated at your attic's highest points stays trapped. This, in turn, can lead to uneven roof temperatures (ice dams), an overtaxed HVAC (higher energy bills), and other costly headaches.
If your house is in a sheltered location, you may find other venting systems more effective. Additionally, too much wind can cause them to break off your roof. Another key disadvantage of wind-powered vents is that the moving parts can become quite noisy as they age.
A ridge vent costs between $300 and $650 on average, with most people paying about $500. Your final costs will vary based on the size, type, and number of units you install. A local professional will be able to give you more accurate information in terms of pricing.
While ridge vents have many advantages, they are not always ideal. In cold climates, ridge vents can allow snow into the attic. They're also more expensive than box vents and won't work on all types of roofs.
MYTH: Considering the problems caused by insufficient insulation, it's best to have as much air flowing through the attic as possible. Truth: Ventilation needs vary. Too much ventilation can cause leaks, encourage pest infestations, and leave your attic vulnerable to storm damage.
The larger the attic, the more vents you'll need to ensure proper ventilation. As a general rule, you should have at least one square foot (144 square inches) of ventilation for every 300 square feet of attic space.
While you may be tempted to do it yourself, the safest way to go is to hire a local roofing company to do the job. Roofers have the training, licensing, and experience needed to install a ventilation system on your roof, without putting you at risk of leaks.
The truth is, most experts agree that though other roof vents allow some ventilation (which is better than none), ridge vents are the most efficient and cost-effective roof ventilation system around. Our recommendation is yes. Especially if you are installing a new roof, you want to extend its life as long as possible.
You can use a thermometer and a hygrometer to measure the temperature and humidity in your attic. Ideally, the temperature and humidity in your attic should be close to the outside air. If your attic is too hot or too humid, it means that your attic is not properly ventilated and needs more airflow.
Don't worry, you won't have to replace the entire roof deck to install a new roof ridge vent. The old method for installing ridge vents was to use the aluminum ridge vent or just aluminum strips, however, nowadays the preferred method is a shingle over ridge vent system.